Which type of system is described as having circuits actuated by automatic devices such as detectors?

Which type of system is described as having circuits actuated by automatic devices such as detectors?

• A. Manual fire alarm system
• B. Automatic fire alarm system
• C. Central station system
• D. Standby system

Answer: (B)

The key idea here is automatic initiation: the alarm is started by devices that detect conditions indicating a fire, not by people pulling a switch. In an automatic fire alarm system, detectors such as smoke or heat sensors automatically actuate the alarm circuits. When these detectors sense danger, they send a signal to the control panel, which then sounds the alarms and possibly notifies building occupants or authorities, all without someone having to take action. This enables immediate warning even if occupants are unaware or unable to respond. Manual fire alarm systems, by contrast, rely on people to activate initiating devices like pull stations; the alarm only sounds after someone takes that action. A central station system refers to signals being transmitted to a remote monitoring center, which is about where the signal goes after initiation rather than how it’s initiated. Standby system isn’t a typical defining category for how initiation occurs in fire alarm systems.

The key idea here is automatic initiation: the alarm is started by devices that detect conditions indicating a fire, not by people pulling a switch. In an automatic fire alarm system, detectors such as smoke or heat sensors automatically actuate the alarm circuits. When these detectors sense danger, they send a signal to the control panel, which then sounds the alarms and possibly notifies building occupants or authorities, all without someone having to take action. This enables immediate warning even if occupants are unaware or unable to respond.

Manual fire alarm systems, by contrast, rely on people to activate initiating devices like pull stations; the alarm only sounds after someone takes that action. A central station system refers to signals being transmitted to a remote monitoring center, which is about where the signal goes after initiation rather than how it’s initiated. Standby system isn’t a typical defining category for how initiation occurs in fire alarm systems.